Make chrec_contains_symbols true for POLY_INT_CST

2018-01-05  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
	* tree-chrec.c (chrec_contains_symbols): Return true for
	POLY_INT_CST.

From-SVN: r256276

gcc/ChangeLog

+2018-01-05  Richard Sandiford  <richard.sandiford@linaro.org>
+
+	* tree-chrec.c (chrec_contains_symbols): Return true for
+	POLY_INT_CST.
+
 2018-01-05  Sudakshina Das  <sudi.das@arm.com>
 
 	PR target/82439

gcc/tree-chrec.c

@@ -961,6 +961,7 @@ chrec_contains_symbols (const_tree chrec)
 
   if (TREE_CODE (chrec) == SSA_NAME
       || VAR_P (chrec)
+      || TREE_CODE (chrec) == POLY_INT_CST
       || TREE_CODE (chrec) == PARM_DECL
       || TREE_CODE (chrec) == FUNCTION_DECL
       || TREE_CODE (chrec) == LABEL_DECL